CN110896134A

CN110896134A - Battery module

Info

Publication number: CN110896134A
Application number: CN201811066953.2A
Authority: CN
Inventors: 张文斌; 邱普德; 庄少棋; 李文枢
Original assignee: Acer Inc
Current assignee: Acer Inc
Priority date: 2018-09-13
Filing date: 2018-09-13
Publication date: 2020-03-20

Abstract

The invention provides a battery module which comprises a first frame, a second frame, a plurality of battery monomers, a plurality of first connecting pieces and a plurality of second connecting pieces. The plurality of battery cells are arranged between the first frame and the second frame, and each battery cell is provided with a first electrode and a second electrode. The plurality of first connectors are disposed on the plurality of battery cells and close to the first frame, and the plurality of first connectors are electrically coupled to the plurality of first electrodes, respectively. The plurality of second connecting pieces are arranged on the plurality of battery cells and close to the second frame, and the plurality of second connecting pieces are respectively and electrically coupled with the plurality of second electrodes. The first ends of the first connecting pieces extend out of the first frame and are connected into a whole. The second ends of the second connecting pieces extend out of the second frame and are arranged at intervals.

Description

Battery module

Technical Field

The present invention relates to a battery module, and more particularly, to a battery module that is easy to replace and assemble.

Background

The existing lithium battery module is formed by combining a plurality of lithium batteries in a series connection mode or a parallel connection mode, and the lithium battery module has the advantages of high energy density, long cycle life, large charging power and the like, so that the lithium battery module can be developed to the present, and can be used as an electric power storage device for supplying an electric locomotive and an electric automobile.

The existing lithium battery module mainly connects each battery cell in series and in parallel through the metal nickel to achieve the required voltage and current, and when the larger power output is needed, the number of the battery cells needs to be correspondingly increased, so that the specification of the lithium battery module is mostly customized. However, the metal nickel of the lithium battery module is welded on each battery cell and welded along the positive and negative directions to complete series connection or parallel connection, which results in complicated assembly steps and a large volume of the finished lithium battery module, which is not easy to store. In addition, the battery cells of the lithium battery module are welded to each other and are not easily disassembled, and when any contact or any battery in the lithium battery module is damaged, the whole lithium battery module needs to be replaced. For this reason, it is a major development goal to develop a lithium battery module that is easy to assemble and easy to replace the damaged area.

Disclosure of Invention

The invention provides a battery module which has the characteristics of quick assembly and easy disassembly and replacement.

The battery module comprises a first frame, a second frame, a plurality of battery monomers, a plurality of first connecting pieces and a plurality of second connecting pieces. The plurality of battery cells are arranged between the first frame and the second frame, and each battery cell is provided with a first electrode and a second electrode. The plurality of first connectors are disposed on the plurality of battery cells and close to the first frame, and the plurality of first connectors are electrically coupled to the plurality of first electrodes, respectively. The plurality of second connecting pieces are arranged on the plurality of battery cells and close to the second frame, and the plurality of second connecting pieces are respectively and electrically coupled with the plurality of second electrodes. The first ends of the first connecting pieces extend out of the first frame and are connected into a whole. The second ends of the second connecting pieces extend out of the second frame and are arranged at intervals.

In view of the above, the battery module of the present invention includes a plurality of modularized first connecting members and second connecting members, when a plurality of battery modules of the present invention are combined, the plurality of battery modules are stacked up and down, the second connecting member of the upper battery module contacts the first connecting member of the lower battery module, and so on, to complete the electrical coupling of the plurality of battery modules. The invention adopts the assembly mode of stacking contact, thereby greatly improving the assembly speed of a plurality of battery modules. In addition, when one of the battery modules is damaged, only the damaged battery module needs to be taken down and replaced by a new battery module, and the battery modules do not need to be replaced completely.

Drawings

Fig. 1A is a perspective view of a battery module according to an embodiment of the invention.

Fig. 1B is a perspective view of the battery module of fig. 1A in another direction.

Fig. 1C is a schematic cross-sectional view of the battery module of fig. 1A taken along section a-a.

Fig. 2A and 2B are schematic plan views of parts of the battery module of fig. 1A and 1B, respectively.

Fig. 2C and 2D are partially enlarged schematic views of the battery module of fig. 1C.

Fig. 3A is a schematic view of elements of the battery module of fig. 1A in a direction along a section B-B.

Fig. 3B is a schematic view of elements of the battery module of fig. 1A in another direction along the B-B section.

Fig. 4A is an exploded perspective view of a plurality of battery modules of the present invention.

Fig. 4B is an assembled perspective view of a plurality of battery modules of fig. 4A.

Fig. 4C is a partially enlarged schematic view of the first and second connection members of fig. 4B.

Description of reference numerals:

100: a battery module;

110: a first frame;

111: a first positioning post;

120: a second frame;

121: a second positioning column;

130: a battery cell;

131: a first electrode;

132: a second electrode;

140: a first connecting member;

141: a conduction plate;

150: a second connecting member;

c: a curved plate;

f: a spring plate;

g: a slot;

o1: a first perforation;

o2: a second perforation;

e1: a first end;

e2: a second end;

AS: an accommodating space;

LD: a length direction;

d1, D2: a distance;

w1, W2: width.

Detailed Description

In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.

Fig. 1A is a perspective view of a battery module according to an embodiment of the invention. Fig. 1B is a perspective view of the battery module of fig. 1A in another direction. Fig. 1C is a schematic cross-sectional view of the battery module of fig. 1A taken along section a-a.

Referring to fig. 1A to 1C, the battery module 100 of the present embodiment is a finished product formed by combining a plurality of lithium ion battery cells in a series-parallel manner and installing a single battery monitoring and management device (not shown), for example, and the voltage and current specifications of the battery module 100 are determined according to the applied electronic product. The battery module 100 of the present invention is used as a power storage device for supplying electric vehicles and electric vehicles, for example.

The battery module 100 of the present embodiment includes a first frame 110, a second frame 120, a plurality of battery cells 130, a plurality of first connectors 140, and a plurality of second connectors 150. The first frame 110 and the second frame 120 are spaced up and down and aligned with each other.

The plurality of battery cells 130 are disposed between the first frame 110 and the second frame 120 and are in an array. Each battery cell 130 has a first electrode 131 and a second electrode 132, each first electrode 131 is located in the first frame 110, and each second electrode is located in the second frame 120, (the first electrode 131 and the second electrode 132 can be a positive electrode and a negative electrode, or a negative electrode and a positive electrode, respectively). In the present embodiment, the battery cell 130 is a rechargeable lithium ion battery or a lithium ion polymer battery. In other embodiments, other types of rechargeable batteries can be used as the battery cells, such as: lead storage batteries, nickel-hydrogen batteries, nickel-cadmium batteries, or the like.

Further, the number of the plurality of battery cells 130 in fig. 1A and 1B is 60, and the plurality of battery cells are linearly arranged and divided into six rows. In other embodiments, the number of the battery cells is determined according to the requirement, and therefore, the invention is not limited thereto.

Fig. 2A and 2B are schematic plan views of parts of the battery module of fig. 1A and 1B, respectively. Fig. 2C and 2D are partially enlarged schematic views of the battery module of fig. 1C.

Referring to fig. 1C, 2A to 2D, a plurality of first connectors 140 are disposed on the plurality of battery cells 130 and close to the first frame 110. In detail, the number of the first connectors 140 is six, and the six first connectors 140 are electrically coupled to sixty first electrodes 131 of the six rows of battery cells 130, respectively, and each first connector 140 abuts against the corresponding and linearly arranged first electrodes 131 by welding, clamping or other methods. In addition, the first end E1 of each first connector 140 extends out of the first frame 110 and is integrally connected with each other to connect the plurality of battery cells 130 in parallel.

The plurality of second connectors 150 are disposed on the plurality of battery cells 130 and adjacent to the second frame 120. In detail, the number of the second connectors 150 is six, and the six second connectors 140 are electrically coupled to sixty second electrodes 132 of the six rows of battery cells 130, respectively, and each second connector 140 abuts against the corresponding and linearly arranged second electrodes 132 by welding, clamping or other methods. In addition, the second ends E2 of the second connecting members 150 extend out of the second frame 120 and are spaced apart from each other, and the second connecting members 150 are parallel to the first connecting members 140.

In addition, each of the first connecting elements 140 and each of the second connecting elements 150 are made of nickel metal or other metal materials with conductive properties.

Referring to fig. 2A to 2D, the first end E1 of each first connection member 140 extends toward the second frame 120 and is parallel to the length direction LD of each battery cell 130. Each first end E1 has slots G, and the width W1 of each slot G is greater than the width W2 of each second end E2. In detail, the plurality of curved plates C are respectively disposed on the plurality of first terminals E1 to form the slots G, and a plurality of conducting plates 141 are disposed between the first terminals E1 of the first connectors 140 to connect the plurality of first terminals E1 together and electrically couple the first terminals E3526 to each other.

The second end E2 of each second connection member 150 extends away from the second frame 120 and is parallel to the length direction LD of each battery cell 130. Each second end E2 has a spring F, and the distance D1 of each spring F from each battery cell 130 is greater than the distance D2 of the curved plate C on each first end E1 from each battery cell 130. In detail, one end of each spring F is connected to each second connector 150, and the other end of each spring F is suspended in each second connector 150, so that an accommodating space AS is formed between the corresponding spring F and the second end E2.

Fig. 3A is a schematic view of elements of the battery module of fig. 1A in a direction along a section B-B. Fig. 3B is a schematic view of the battery module of fig. 1A taken in another direction of the B-B section.

Please refer to fig. 1A, 3A and 3B. In the present embodiment, the first frame 110 has a plurality of first positioning posts 111 arranged at intervals. The second frame 120 has a plurality of second positioning pillars 121 arranged at intervals. The first positioning posts 111 are respectively aligned with the second positioning posts 121, and two ends of each battery cell 130 are respectively positioned in the corresponding first positioning posts 111 and the second positioning posts 121.

In detail, two ends of each battery cell 130 are respectively abutted by the four first positioning pillars 111 and the four second positioning pillars 121 to be positioned between the first frame 110 and the second frame 120. Wherein the first electrode 131 of each battery cell 130 faces the first frame 110, and the second electrode 132 faces the second frame 120. Further, each of the first connectors 140 and each of the second connectors 150 penetrate through the side surfaces of the first frame 110 and the second frame 120, respectively, to contact each of the first electrodes 131 and each of the second electrodes 132, respectively.

In the present embodiment, referring to fig. 2A-2C, the first connector 140 penetrates from the left side of the first frame 110 and the second connector 150 penetrates from the right side of the second frame 120. In other embodiments, the first connecting element and the second connecting element can also be arranged on the left side or the right side at the same time, which does not affect the transmission direction of the current, but is modified according to the assembly requirement.

In addition, each first positioning column 111 and each second positioning column 121 are disposed in a hollow manner. Since the peripheral surface of each single battery 130 contacts the first positioning post 111 and the second positioning post 121, when each single battery 130 is charged or discharged, high temperature is generated, so as to prevent the heat generated by the single battery 130 from being transferred to other adjacent single batteries 130 through each first positioning post 111 and each second positioning post 121, which may cause over-high temperature. Therefore, the interiors of the first positioning column 111 and the second positioning column 121 are hollow, so that the heat conduction performance of the first positioning column 111 and the second positioning column 121 is weakened.

Referring to fig. 1A and 1C, the first frame 110 has a plurality of first through holes O1. The second frame 120 has a plurality of second through holes O2. Each of the first through holes O1 and each of the second through holes O2 respectively face the first electrode 131 and the second electrode 132 of each of the battery cells 130, and partially expose the corresponding first connecting member 140 and the corresponding second connecting member 150. The heat dissipation efficiency of the battery module 100 is improved by the first through holes O1 and the second through holes O2.

Fig. 4A is an exploded perspective view of a plurality of battery modules of the present invention. Fig. 4B is an assembled perspective view of a plurality of battery modules of fig. 4A. Fig. 4C is a partially enlarged schematic view of the first and second connection members of fig. 4B.

Referring to fig. 1A and 4A-4C, when a plurality of battery modules 100 are assembled (here, two battery modules are taken as an example), a plurality of second connecting members 150 of an upper battery module 100 are respectively aligned with a plurality of first connecting members 140 of a lower battery module 100. Referring to fig. 4B and 4C in detail, the second end E2 of each second connecting member 150 is inserted through the slot G (see fig. 2A and 2B) of each first connecting member 140 until the elastic sheet F (see fig. 2B) of each second connecting member 150 is clamped against the curved plate C (see fig. 2A) of each first connecting member 140 and the second frame 120 of the upper battery module 100 is stacked on the first frame 110 of the lower battery module. At this time, the upper battery module 100 is electrically coupled to the second connectors 150 of the lower battery module 100 through the first connectors 140, so as to connect the two battery modules 100 in series. Further, if a plurality of battery modules are to be connected in series, the first connecting member 140 and the second connecting member 150 of the upper and lower battery modules 100 are sequentially connected according to the above connection method.

Referring to fig. 4A and 4B, since the first connecting member 140 and the second connecting member 150 are only clamped and abutted, when two battery modules 100 are to be disassembled, the first connecting member 140 and the second connecting member 150 of the two battery modules 100 stacked with each other are separated by external force, and the disassembly is completed, so that the battery module 100 of the invention has the characteristics of easy disassembly and replacement.

In summary, the battery module of the present invention includes a plurality of modularized first connecting members and a plurality of modularized second connecting members, when the plurality of battery modules are combined, the plurality of battery modules are stacked up and down in sequence, the second connecting member of the upper battery module contacts the first connecting member of the lower battery module, and so on, to complete the electrical coupling of the plurality of battery modules. The invention adopts the assembly mode of stacking contact, and can greatly improve the assembly and disassembly speed of a plurality of battery modules. In addition, when one of the battery modules is damaged, only the damaged battery module needs to be taken down and replaced by a new battery module, and the replacement is not required, so that the replacement cost can be greatly saved.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. A battery module, comprising:

a first frame;

a second frame;

a plurality of battery cells disposed between the first frame and the second frame, each battery cell having a first electrode and a second electrode;

a plurality of first connectors disposed on the battery cells and close to the first frame, the first connectors being electrically coupled to the first electrodes, respectively; and

a plurality of second connectors disposed on the battery cells and close to the second frame, the second connectors being electrically coupled to the second electrodes respectively,

wherein, a first end of each first connecting piece extends out of the first frame, the first ends are mutually connected into a whole, a second end of each second connecting piece extends out of the second frame, and the second ends are mutually arranged at intervals.

2. The battery module of claim 1, wherein the first end of each of the first connectors extends toward the second frame and is parallel to a length direction of each of the battery cells.

3. The battery module of claim 2, wherein each of the first ends has a slot, and wherein the width of each slot is greater than the width of each of the second ends.

4. The battery module of claim 1, wherein the second end of each second connecting member extends away from the second frame and parallel to a length direction of each battery cell.

5. The battery module of claim 4, wherein each second end has a spring, and a distance between each spring and each battery cell is greater than a distance between each first end and each battery cell.

6. The battery module of claim 1, wherein a plurality of conductive plates are disposed between the first ends of the first connecting members to connect the first ends together and electrically couple the first ends to each other.

7. The battery module of claim 1, wherein each of the first connecting members abuts against a portion of the first electrodes arranged in a line and each of the second connecting members abuts against a portion of the second electrodes arranged in a line.

8. The battery module of claim 1, wherein the first frame has a plurality of first positioning posts spaced apart from each other, the second frame has a plurality of second positioning posts spaced apart from each other, the first positioning posts are respectively aligned with the second positioning posts, and two ends of each battery cell are respectively positioned between a corresponding portion of the first positioning posts and between a corresponding portion of the second positioning posts.

9. The battery module of claim 8, wherein each of the first positioning posts and each of the second positioning posts are hollow.

10. The battery module of claim 1, wherein the first frame has a plurality of first through holes, the second frame has a plurality of second through holes, and each of the first through holes and each of the second through holes respectively faces the first electrode and the second electrode of each of the battery cells and partially exposes the corresponding first connecting member and the corresponding second connecting member.